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using Gee;

namespace Xmpp.Xep.Bookmarks {
private const string NS_URI = "storage:bookmarks";

public class Module : BookmarksProvider, XmppStreamModule {
    public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0048_bookmarks_module");

    public async Set<Conference>? get_conferences(XmppStream stream) {
        Set<Conference> ret = new HashSet<Conference>(Conference.hash_func, Conference.equal_func);

        StanzaNode get_node = new StanzaNode.build("storage", NS_URI).add_self_xmlns();
        stream.get_module(PrivateXmlStorage.Module.IDENTITY).retrieve(stream, get_node, (stream, node) => {
            if (node != null) {
                Gee.List<StanzaNode> conferences_node = node.get_subnode("storage", NS_URI).get_subnodes("conference", NS_URI);
                foreach (StanzaNode conference_node in conferences_node) {
                    Conference? conference = Bookmarks1Conference.create_from_stanza_node(conference_node);
                    ret.add(conference);
                }
            }
            Idle.add(get_conferences.callback);
        });
        yield;

        return ret;
    }

    private void set_conferences(XmppStream stream, Set<Conference> conferences) {
        StanzaNode storage_node = (new StanzaNode.build("storage", NS_URI)).add_self_xmlns();
        foreach (Conference conference in conferences) {
            Bookmarks1Conference? bookmarks1conference = conference as Bookmarks1Conference;
            if (bookmarks1conference != null) {
                storage_node.put_node(bookmarks1conference.stanza_node);
            } else {
                StanzaNode conference_node = new StanzaNode.build("conference", NS_URI)
                    .put_attribute("jid", conference.jid.to_string())
                    .put_attribute("autojoin", conference.autojoin ? "true" : "false");
                if (conference.name != null) {
                    conference_node.put_attribute("name", conference.name);
                }
                if (conference.nick != null) {
                    conference_node.put_node(new StanzaNode.build("nick", NS_URI)
                        .put_node(new StanzaNode.text(conference.nick)));
                }
                // TODO (?) Bookmarks 2 currently don't define a password
                storage_node.put_node(conference_node);
            }
        }
        stream.get_module(PrivateXmlStorage.Module.IDENTITY).store(stream, storage_node, (stream) => {
            stream.get_module(Module.IDENTITY).received_conferences(stream, conferences);
        });
    }

    public async void add_conference(XmppStream stream, Conference conference) {
        Set<Conference>? conferences = yield get_conferences(stream);
        conferences.add(conference);
        stream.get_module(Module.IDENTITY).set_conferences(stream, conferences);
    }

    public async void replace_conference(XmppStream stream, Conference orig_conference, Conference modified_conference) {
        Set<Conference>? conferences = yield get_conferences(stream);
        conferences.remove(orig_conference);
        conferences.add(modified_conference);
        stream.get_module(Module.IDENTITY).set_conferences(stream, conferences);
    }

    public async void remove_conference(XmppStream stream, Conference conference_remove) {
        Set<Conference>? conferences = yield get_conferences(stream);
        conferences.remove(conference_remove);
        stream.get_module(Module.IDENTITY).set_conferences(stream, conferences);
    }

    public override void attach(XmppStream stream) { }

    public override void detach(XmppStream stream) { }

    public override string get_ns() { return NS_URI; }
    public override string get_id() { return IDENTITY.id; }
}

}